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Public key encryption uses multiple keys.ne key is used to encrypt data, while another is used to decrypt data.he key used to encrypt data is called the _______ key, while the key used to decrypt data is called the ________ key.
If, f: A → B and g: B → C. Then which of the following statements are true: 1. f o g exists and it is a function on B. 2. g o f exists and it is function from A to C. 3. f o g does not exists. 4. g o f does not exists.
A data-driven machine is one that executes an instruction if the needed data is available. The physical ordering of the code listing does not dictate the course of execution. Consider the following pseudo-code 1) Multiply E by 0.5 to get F 2) Add A and B to get E 3) Add B with 0.5 to get D 4) Add E and F to get G 5) Add A with 10.5 to get C Assume A, B, C are already assigned values and the desired output is G Which of the following sequence of execution is valid?
Given the following statements: S1: A foreign key declaration can always be replaced by an equivalent check assertion in SQL. S2: Given the table R (a, b, c) where a and b together form the primary key, the following is a valid table definition. CREATE TABLE S (                 a INTEGER,                 d INTEGER,                 e INTEGER,                 PRIMARY KEY (d)                 FOREIGN KEY (a) references R) Which one of the following statements is CORRECT?
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Statements : Some clips are copies. Some copies are magazines. No magazines is a dictionary

Conclusions :
I. No copies are dictionary.
II. Some copies are dictionary.
III. Some copies are not dictionary.
IV. No clips are magazines.
In Python, how can you check if a key exists in a dictionary?